Bad service Edgars Matlosana mall Klerksdorp

My husband purchased me a Guess watch on the 11th of December 2018 at Edgars Matlosana mall Klerksdorp I received it for christmas. When he purchased the item the lady helping him opened the watch because the battery wasnt working she left the store to purchase a battery from a jewelry store in the mall 2 weeks after receiving my watch it just stopped working after a day passed it worked again so I thought its okay maybe the wiser wasnt properly in it happened again on 30 January took it back I was told the lady who helped me is on leave they can't help me I should leave the watch with them I wrote a letter explaining everything and she will come back to me she never called. Last week my husband went 14 February she was back from leave but watch still at edgars she said she must send it to guess and that takes 6 weeks and told me manager is on leave he should go back next day and the will give him a voucher. He went back and the manager said no he can't get a voucher the going to send watch back and they will fix it. I dont want the watch back I want a voucher why did the replace the battery the booklet explains that guess batteries lasts longer than regular batteries there was something wrong with the watch already when we purched it. And I still haven't received one call from them.